kicad-developers team mailing list archive

[José Ignacio <jose.cyborg@xxxxxxxxx>]

Those artifacts look like duplicate vertexes with normals pointing
different directions, ideally, for smooth shading wou'd want to break
up the mesh on each facet of the model (ie: have all vertexes from the
star pointing up, the other side pointing down and each side pointing
perpendicular to each rectangle). In Blender you'd use the edgesplit
modifier since even without the duplicate vertexes that star would
look really ugly with automatically computed normals and smooth
shading.


On Tue, Dec 15, 2015 at 10:21 PM, Cirilo Bernardo
<cirilo.bernardo@xxxxxxxxx> wrote:
> Hi folks,
>
>  I've added 3D per-vertex normal calculations to the 3D model plugins
> but I'm calculating bad figures as seen in the *.wrl file below and a
> corresponding render from view3dscene:
>
> https://drive.google.com/file/d/0By_XTJN-s8aXX3pCeFhWbTZNYWs/view?usp=sharing
>
> https://drive.google.com/file/d/0By_XTJN-s8aXSmNEMlhOblRlLUE/view?usp=sharing
>
> Does anyone have some idea what I could be doing wrong to get such artefacts
> in the image? I would like to fix my per-vertex normals calculation as it's
> meant
> to be a tool to help 3D plugin developers create normals lists in cases
> where
> the model does not provide the information.
>
> - Cirilo
>
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